Alert archive / Texas / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 83, NWS Houston/Galveston, TX

May 22, 2020Montgomery County, Walker County, Texas

NWS Houston/Galveston, TX issued this severe thunderstorm warning at May 22, 2020, 4:58 PM CDT for Montgomery County, Walker County, Texas. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 22, 2020, 4:58 PM CDT (21:58 UTC)
Expired
May 22, 2020, 5:30 PM CDT
In force
32 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Montgomery County, TX, Walker County, TX

The radar

The Houston radar (KHGX), 125 km from the middle of the area, began a volume at 21:57 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.0 hours before the alert went out and 306 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Fort Worth, TX at 12:00Z on 2020-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 580 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2020-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
580 J/kg
Mixed-layer CIN
-430 J/kg
Mixed-layer LCL
1997 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 22, 3:43 PM CDTSpecial Weather StatementHGXWalker47 min
May 22, 4:25 PM CDTSevere Thunderstorm WarningHGXMontgomery, San Jacinto, Walker35 min
May 22, 4:29 PM CDTAreal Flood AdvisoryHGXSan Jacinto, Walker61 min
May 22, 4:39 PM CDTSpecial Weather StatementHGXHouston36 min
May 22, 4:54 PM CDTRip Current StatementHGXBrazoria, Galveston, Matagorda29 hr
May 22, 5:04 PM CDTSpecial Weather StatementHGXHouston41 min
May 22, 5:31 PM CDTSpecial Weather StatementHGXGrimes44 min

Nearby

Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.